| 年份 | 也门共和国 |
|---|---|
| 2023 | - |
| 2022 | 6.33226 |
| 2021 | 6.18939 |
| 2020 | 6.04083 |
| 2019 | 5.88606 |
| 2018 | 5.71911 |
| 2017 | 5.54457 |
| 2016 | 5.37416 |
| 2015 | 5.20989 |
| 2014 | 5.0514 |
| 2013 | 4.90944 |
| 2012 | 4.78865 |
| 2011 | 4.68084 |
| 2010 | 4.58458 |
| 2009 | 4.49931 |
| 2008 | 4.42415 |
| 2007 | 4.35299 |
| 2006 | 4.28265 |
| 2005 | 4.21457 |
| 2004 | 4.15538 |
| 2003 | 4.101 |
| 2002 | 4.04387 |
| 2001 | 3.99134 |
| 2000 | 3.94836 |
| 1999 | 3.91274 |
| 1998 | 3.88308 |
| 1997 | 3.85848 |
| 1996 | 3.8373 |
| 1995 | 3.82292 |
| 1994 | 3.81372 |
| 1993 | 3.81098 |
| 1992 | 3.81991 |
| 1991 | 3.83797 |
| 1990 | 3.86342 |
| 1989 | 3.91865 |
| 1988 | 4.01269 |
| 1987 | 4.14045 |
| 1986 | 4.30125 |
| 1985 | 4.4653 |
| 1984 | 4.59437 |
| 1983 | 4.68629 |
| 1982 | 4.74702 |
| 1981 | 4.78584 |
| 1980 | 4.83639 |
| 1979 | 4.89951 |
| 1978 | 4.96679 |
| 1977 | 5.03501 |
| 1976 | 5.09346 |
| 1975 | 5.13614 |
| 1974 | 5.17007 |
| 1973 | 5.19828 |
| 1972 | 5.22126 |
| 1971 | 5.24525 |
| 1970 | 5.27325 |
| 1969 | 5.301 |
| 1968 | 5.3247 |
| 1967 | 5.3472 |
| 1966 | 5.36988 |
| 1965 | 5.39271 |
| 1964 | 5.41434 |
| 1963 | 5.43324 |
| 1962 | 5.44842 |
| 1961 | 5.45872 |
| 1960 | 5.46469 |